Hi Mike,
Ooooh, analogue. I remember that.
Possibly still available (I checked the Digikey book without success, but
RS etc. maybe?) would be bucket-brigade delay lines, which were used
extensively for audio effects (delay / spin / reverb etc.) in the olde
days. Recoton was a manufacturer if memory serves, as I think were
NatSemi, but they've been shedding even less esoteric product than that in
recent years.
They had only so-so noise performance, but their dynamic range would be
plenty good enough for what you're suggesting. The through delay is
varied by clocking their fixed-length chain of buckets faster or slower.
73
Steve W3EEE / G3YDV
Mike Dennison wrote:
I have been playing around with feeding differently derived audio into
the two halves of stereo headphones with some interesting results.
I will report in detail when the tests are complete. In short, it is
certainly possible to improve headphone reception, both in terms of
close-in selectivity and resistance to static.
One question. How do I make an electronic circuit to delay a
broadband audio signal by about one-thousandth of a second,
without resorting to DSP? Any genius out there with a simple
circuit? And yes I do know about the methods (that were originally
used for electric guitar echo) such as connecting the diaphragms of
a loudspeaker and a microphone by using a spring, and also the
tape recorder method.
Mike, G3XDV (IO91VT)
http://www.dennison.demon.co.uk/activity.htm
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